Roller for grinding-mills



(No ModeL) G. VAN NAME.-

' 1 ROLLER FOR GRINDING MILLS. No. 291,654. Patented Jan. 8, 1884.'

Fey 3 Inveni or.

N. PETERS. Phatn-uxhagn hu, Washington. D4 0 V L UNTTE STATES PATENTFFIcE.

ROLLER FOR GRINDING-MILLS SPECIFICATION forming part of Letters PatentNo. 291,654, dated January 8, 1884.

Application filed April 26, 1883.

To all whom it may concern:

Be it known that I, GEORGE VAN NAME, a citizen of theUnited States,residing. at St. Louis, in the State of Missouri, have invented certainnew and useful Improvements in Rollers for Grinding-Mills, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

This invention relates to improvements in rollers for Grinding-Mills,and it consists in the construction of the rollers, all of which will behereinafter more fully described, and pointed out in the claim;

In the drawings accompanying and forming part of this specification,Figure 1 is a longitudinal section of a roller, with blades arranged ingrooves around the surface, parallel with the axis. Fig. 2 isacrosssection of the roller, showing the blades of hard and softmaterial. Fig. 3 represents one of the blades detached.

Fig. 4 is a sideview of the cylinder without. blades. Fig. 5 is an endview, showing thelongitudinal grooves for keying the blades.

A is the shaft, on which the cylinderB is made secure. Two or moredovetailed annular grooves, b b,a're cut around the surface of cylinderB, andxfour longitudinal grooves, e fg h, are cut. slightly dovetailedin the surface of the cylinder B. Blades of hardened steel 0 G areformed with dovetailed tongues c c, to correspond with the grooves b b.There are also blades 0 O, of the same form, made of any softermaterialas soft iron, hardened paper, wood, &c.to be placed alternately3 5 with the steel blades. These blades 0 and C 7 (No model.)

are inserted by dropping them into, or sliding them endwise in, thelongitudinal grooves e fg h, and the dovetailed tongues are entered intogrooves b b, and moved around the cylinder 'B. The surface of therolleris made up each way from these= grooves, until each quadrant is full,leaving room only for four key-blades, which are dovetailed to fit thegrooves e f g h, and driven in endwise, thus keying securely the bladesin the four quadrants of the cylinder B. Should any blade or bladesrequireremoval, it will be seen that by this construction it will be butlittle trouble to remove it or them without disturbing either of theother sections beyond the longitudinal grooves nearest the defectiveblades.

I am aware that rollers for grinding-mills havebeen constructed ofalternate blades of 7 .presence of two witnesses.

GEO. VAN NAME.

Witnesses:

JonN Locum. CHAS. S. SHEEVE.

